JET Mill Training

Provided by Mentors of Team 624

Mill Parts

Mill PartsHead Assembly

Mill Parts

Mill Operation

Only Changed with Motor OFF

For most work being performed it is recommended for the RPM to be 800-850

Mill Operation

Though the Motor Switch is labeled FWD & REV this can be confusing.

Normal operations, in the 800-850 RPM range, are conducted in the HIGH speed selection and the Motor Switch is in FWD.

If operating the mill from the LOW speed selection, for proper cutting the Motor Switch will be in REV.

Mill Operation

The Vari-Speed Handwheel (A) changes the RPM of the Spindle. This handwheel is to only be moved while the motor is running. The Speed Range Panel (B) will change as the wheel is turned.

For most work being performed it is recommended for the RPM to be 800-850.

Mill Operation

The Drawbar Hex is utilized to tighten cutting bits into the Spindle.

To Tighten or Loosen the Hex, using the provided wrench, pulling down on the Spindle Brake, Turn the wrench the appropriate direction.

Note: If the Drawbar Hex is not visible, Loosen the Quill Lock Lever and use the Course Feed Handle to return the Quill/Spindle to the top.

Also, there is a Step stool which can be used to reach the Hex.

Mill Operation

When you turn the Motor Switch OFF it is recommended that you utilize the Spindle Break to slow and stop the spindle from turning. This is accomplished by pulling the lever down with a steady force.

The Course Feed Handle is used to adjust the Quill (spindle) height. The Quill Lock Lever is used to Lock the Quill (spindle) at a designated level.

Mill Operation

For Major height adjustments the operator will loosen the two Knee Lock Handles on the side of the Knee, then using the Knee Crank adjust the height of the knee to the appropriate height. Then tighten the Knee Locking Handles.

*** It is recommended that the Knee Crank be removed and placed back on with the handle facing the mill (inward) when not being used to prevent injuries. ***

Mill OperationThe Longitudinal Crank (only one on Left side) controls the X Axis. The Table Locking Handle enables the X Axis to be locked.This model does have a motor for movement of the table. Demonstration of the proper use of the motor will be conducted during “hands on” training.

The Crossfeed Crank controls the Y Axis. This moves the table saddle forward/backward. The Saddle Locking Handle locks the saddle movement (Y Axis).

Mill OperationThe Ram can be adjusted to accommodate large projects. The Ram essentially extends the Y Axis by moving the Head assembly forward and backward. There are two locking handles and

The Crossfeed Crank controls the Y Axis. This moves the table saddle forward/backward. The Saddle Locking Handle locks the saddle movement (Y Axis).